ci: Remove btrfs logic #7652

Job	Run time
unit-test	1m 27s
integration-test (arch, arch)	5m 8s
integration-test (arch, debian)	6m 0s
integration-test (arch, fedora)	6m 30s
integration-test (arch, ubuntu)	5m 25s
integration-test (centos, debian)	6m 40s
integration-test (centos, fedora)	6m 59s
integration-test (centos, opensuse)	5m 13s
integration-test (centos, ubuntu)	5m 32s
integration-test (debian, arch)	5m 28s
integration-test (debian, fedora)	6m 39s
integration-test (debian, debian)	6m 31s
integration-test (debian, ubuntu)	5m 59s
integration-test (fedora, arch)	5m 33s
integration-test (fedora, debian)	6m 27s
integration-test (fedora, fedora)	6m 9s
integration-test (fedora, opensuse)	5m 22s
integration-test (fedora, ubuntu)	5m 20s
integration-test (opensuse, arch)	4m 42s
integration-test (opensuse, debian)	4m 30s
integration-test (opensuse, fedora)	4m 32s
integration-test (opensuse, opensuse)	4m 18s
integration-test (opensuse, ubuntu)	4m 15s
integration-test (ubuntu, arch)	4m 28s
integration-test (ubuntu, debian)	3m 21s
integration-test (ubuntu, fedora)	2m 30s
integration-test (ubuntu, ubuntu)	3m 3s
	2h 18m 1s

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